From: Alan Cox <alan@lxorguk.ukuu.org.uk>
Date: Tue, 24 Jul 2007 14:17:48 +0000 (+0100)
Subject: pata_hpt37x: Fix 2.6.22 clock PLL regression
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=64a8170975947978ea4094dd6c4b1f41119d6ae6;p=linux-beck.git

pata_hpt37x: Fix 2.6.22 clock PLL regression

	Just one version of Linux ago
	The PLL code broke - oh no!
	But set the right mode
	And fix up the code
	Makes the PLL timing sync go

[whatever happened to the sailor from Nantucket, hero of many limericks?  -jg]

Closes-bug: #8791
Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---

diff --git a/drivers/ata/pata_hpt37x.c b/drivers/ata/pata_hpt37x.c
index b0af65aadde3..84d9c5568567 100644
--- a/drivers/ata/pata_hpt37x.c
+++ b/drivers/ata/pata_hpt37x.c
@@ -26,7 +26,7 @@
 #include <linux/libata.h>
 
 #define DRV_NAME	"pata_hpt37x"
-#define DRV_VERSION	"0.6.6"
+#define DRV_VERSION	"0.6.7"
 
 struct hpt_clock {
 	u8	xfer_speed;
@@ -1103,17 +1103,17 @@ static int hpt37x_init_one(struct pci_dev *dev, const struct pci_device_id *id)
 
 		/* Select the DPLL clock. */
 		pci_write_config_byte(dev, 0x5b, 0x21);
-		pci_write_config_dword(dev, 0x5C, (f_high << 16) | f_low);
+		pci_write_config_dword(dev, 0x5C, (f_high << 16) | f_low | 0x100);
 
 		for(adjust = 0; adjust < 8; adjust++) {
 			if (hpt37x_calibrate_dpll(dev))
 				break;
 			/* See if it'll settle at a fractionally different clock */
-			if ((adjust & 3) == 3) {
-				f_low --;
-				f_high ++;
-			}
-			pci_write_config_dword(dev, 0x5C, (f_high << 16) | f_low);
+			if (adjust & 1)
+				f_low -= adjust >> 1;
+			else
+				f_high += adjust >> 1;
+			pci_write_config_dword(dev, 0x5C, (f_high << 16) | f_low | 0x100);
 		}
 		if (adjust == 8) {
 			printk(KERN_WARNING "hpt37x: DPLL did not stabilize.\n");